initialises an SSO 記念品 to send to the acceptor 味方する and
authenticates an SSO 記念品 returned by the acceptor if the
状況 supports 相互の authentication.
init should be called only once for 状況s which don't support
相互の authentication and at most twice for 状況s which do
support 相互の authentication. 付加 calls produce undefined
results.
Parameter 記念品
the SSO 記念品 received from the acceptor 味方する in 返答 to an
authentication request. This 記念品 is ignored on the first call
to init and should only be 明示するd for the second call on a
状況 supporting 相互の authentication.
Returns
the sequence of bytes to be sent to the acceptor 味方する as part of
an authentication request. This sequence will be 非，不，無 無 length
for the first call to init, 無 length for the second call to init
on a 状況 supporting 相互の authentication and undefined in all
other 事例／患者s.
